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Radar research memorial at St Aldhelm's Head near Worth Matravers, unveiled by Sir Bernard Lovell
The Telecommunications Research Establishment (TRE) was the main United Kingdom research and development organization for radio navigation, radar, infra-red detection for heat seeking missiles, and related work for the Royal Air Force (RAF) during World War II and the years that followed. The name was changed to Radar Research Establishment in 1953, and again to the Royal Radar Establishment in 1957. This article covers the precursor organizations and the Telecommunications Research Establishment up to the time of the name change. The later work at the site is described in the separate article about RRE.
Particularly because of its later change of name to Royal Radar Establishment, TRE is best known for work on defensive and offensive radar. TRE also made substantial contributions to radio-navigation and to jamming enemy radio-navigation. Radar dominates the history.
Bawdsey was only a short E-boat dash across the English Channel from France, a fact that was not lost on the Air Ministry. Watson-Watt planned to move the teams to a safer location in the event of war, and approached the rector of his alma mater, University College at Dundee. It is not clear whose fault it was, but when the war opened in 1939 the AMES teams rushed to Dundee they found the rector was only dimly aware of the earlier conversation and nothing had been prepared. By this time the students had returned for the autumn term and consequently there was little room for the researchers.
In addition to lacking room at the University, the teams working on Airborne Interception radar (AI) were sent to RAF Scone, a small, formerly civilian airfield near Perth that was entirely unsuited to the scale of their work. Complaints by one of the AI team members worked their way up to higher levels of the Ministry, which led to a search for a more suitable location. Late in the year, the AI team was moved to RAF St Athan in Wales, but ultimately found the location to be only marginally better than Perth.
By the early part of 1940 it was clear that the location in Dundee was not going to work in the long term. A new location was ultimately selected in Worth Matravers on the south coast of England, a short distance from the ADRDE teams. The location had a number of advantages, including good views over the English Channel not unlike the ones they had at Bawdsey. However, there was also no infrastructure at the site, which had to be hurriedly prepared. As there was no real village at the site, the location is often referred to as Swanage, a small town a short distance to the east.
The move took place in late May 1940, and further annoyance was created when the careful planning for the move was upset with the AI team arrived first. On arrival, what was AMES was renamed again as the Ministry of Aircraft Production Research Establishment (MAPRE). It was established as the central research group for RAF applications of radar. The name was once again changed to the Telecommunications Research Establishment (TRE) in November 1940.
In parallel with these technical developments, the Ministry of Home Security developed a plan, early in 1939, "to evacuate the critical functions of government out of London" if a threat of air raids developed. A site was purchased in Malvern for the Ministry itself. Although it was not developed, the location had become well known to defence officials. The Air Ministry acquired jurisdiction, and used the site for a Signals Training Establishment, housed in prefabricated one storey buildings. In May 1942, the Radar Research and Development Establishment (RRDE) was set up on the site, to develop truck mounted early warning radars.
In the second week of February 1942, the German battleships Scharnhorst and Gneisenau escaped from Brest in the Channel Dash. They were undetected until well into the English Channel because German ground forces had gradually increased the jamming of British radar over a period of weeks. The British command had not realized this was happening.
In the aftermath, Lord Mountbatten and Winston Churchill approved plans for a raid on the German radar station at Bruneval, near Le Havre. The landing party included D. H. Priest, of TRE. The Bruneval raid (also called the Biting raid) captured a German Wurzburg radar system and a radar operator. These were taken to TRE. During the weeks that followed, the British authorities became concerned that the Germans would retaliate in kind. When intelligence reported the arrival of a German paratroop battalion across the Channel in May, the staff of TRE pulled out of the Swanage site in a period of hours.
The former Telecommunications Research Establishment moved to Malvern, taking up residence in the buildings of Malvern College, an independent boys' boarding school. The move, which was carried out in great urgency, is described in detail by Reginald Jones in his book Most Secret War: British Scientific Intelligence 1939-1945.
At the end of the war TRE moved from Malvern College, to HMS Duke, a Royal Navy training school, about a mile away in St. Andrews Road adjacent to the area of Barnards Green.
Research and development
Radio navigation (navigational beam) systems are based on the transmission of pulsed radio beams that are detected by aircraft. R. J. Dippy devised the GEE (also called AMES Type 7000) radio navigation system at TRE, where it was developed into a powerful instrument for increasing the accuracy of bombing raids.
The counter measure to radio navigation was jamming. R. V. Jones was the MI6 science advisor and TRE staff worked closely with him, in countering the Luftwaffe's navigational beam technology to hamper the enemy's ability to do pinpoint night bombing raids in what has become known as the "battle of the beams". Robert Cockburn of the TRE was responsible for the development of the Jostle IV radio jammer - the most powerful jammer device used over Europe. At 2 kW output it could block all VHF transmissions over 32-48 MHz. However, enclosed in its own pressurised container, (to prevent arcing of the high voltages inside), it was large and at 600 lb took up the entirety of the bomb bay of the Boeing Fortresses used by No. 100 Group RAF. Due to the high transmitter power, test flights had to be carried out in the vicinity of Iceland, otherwise the jamming would have blanked out all frequencies in the specified range, over a large area, as well as giving the Germans warning of the impending arrival of a jamming system.
The Oboe blind bombing system was designed and developed by Frank Jones at TRE in collaboration with Alec Reeves at the Royal Aircraft Establishment. Oboe transponders were fitted to Mosquitoes of 109 Squadron, which developed the use of the device as part of the Pathfinder Force. The Mosquito was chosen because the transponder device mounted in the airplane was not large, and its use required the aircraft to fly for 10 minutes on a straight and level course. That being the case speed was essential to avoid being intercepted. In addition, the Mosquito could reach 30,000 feet altitude, and this improved the range across the continent that the device could be used over.
The Automatic Gun-Laying Turret (AGLT) was an airborne radar used in bombers by the gunners against attack by fighter planes. It was designed by Philip Dee and developed by Alan Hodgkin. The device allowed a turret gunner to fire at and hit a target without ever needing to see it. Known by the codename 'Village Inn', the AGLT was installed in a number of Lancasters and Halifaxes and used operationally during the war, and was also fitted on some post-war Avro Lincolns.
The priority that Winston Churchill placed on the development and deployment of radar is described by Sir Bernard Lovell: Every day Sir Robert Renwick would phone Lovell or Dee, asking "any news, any problems" [and these would be] dealt with by Renwick's immediate access to Churchill.
Radar jamming was developed by Robert Cockburn. The resulting devices, such as Mandrel, Carpet, Piperack, and Jostle, were carried or used by aircraft of No. 100 Group RAF for radio countermeasures and ECM purposes to combat the increasing German night fighter force then opposing the RAF night attacks on Germany.
Cathode ray tubes, for radar display, and a variety of electronic components were developed under direction of Geoffrey Dummer.
Joe AireyMBE Joined radar radio research in 1924. Worked at various TRE locations. Responsible for masts and other equipment. Was Senior Tehnical Officer at the time he was awarded the MBE. Rose to Station Manager RSRE by the time of his retirement.
C. E. Bellinger was one the people "all of whom achieved eminence in their respective fields".
Alan Blumlein, electronics pioneer. Starting in 1924, he worked on telecommunications, sound recording, stereo and television at Columbia and then EMI. While attached to Malvern, he developed the line type pulse modulator, a key element of the H2S airborne radar, vital to bombing missions. He died in the crash of an H2S test flight in June 1942, together with fellow TRE/EMI personnel, F/O Geoffrey Hensby RAFVR, B.Sc. Hons, Cecil Browne and Frank Blythen.
Henry G. Booker, radio-physicist. From 1933 until World War II he worked in the radio-physics group at the Cavendish Laboratory of Cambridge University with J. A. Ratcliffe on magneto-ionic theory of radio wave propagation in the atmosphere. At Malvern, Booker was in charge of theoretical research, covering antennas, electromagnetic wave propagation, and radar systems. After World War II, he taught mathematics at the University of Cambridge, until joining Cornell University in 1948. In 1965 he moved to the University of California at San Diego. The International Union of Radio Science named a Fellowship in his honour. His publications include four books.
E. G. ("Taffy") Bowen (later FRS, CBE) Member of team at Orfordness who, by 1935, had developed the radar that first detected an aircraft. This led to the Chain Home ground-based radar. At Bawdsey, he began development of airborne radar. In 1940 he went to the U.S. with the Tizard Mission. In 1943 he joined the CSIRO in Australia.
R. P. Chasmar, co-author of definitive text The Detection and Measurement of Infra-red Radiation, Clarendon Press, 1960 and, for many years, Head of the infra-red group at RRE.
Robert Cockburn, electronics engineer. He directed the development of radar jamming systems (counter measures) code named Window and widely known as Chaff. An obituary describes this work as "a main contributor to the reduction of civilian [air raid]casualties ... and [bomber] losses". He is in a group photograph. Later, he was knighted.
Joan Curran, invented the Window (Chaff) radio countermeasure system. As Samuel Curran's wife, she became Lady Joan Curran. She also went to the Manhattan project when he did.
G. W. A. Dummer, electronics engineer. He developed the plan position indicator radar display. As head of Synthetic Trainer Design Group, he was responsible for the design, manufacture, installation and servicing of over 70 types of radar training equipment during World War II. In 1944, he became Divisional Leader of the Physical and Tropical Testing Laboratories and the Component Group, that had responsibility for outside contracts. Later, he was one of the innovators of integrated circuits. For his further work see Royal Radar Establishment and his personal article.
A. P. ("Jimmy") Rowe, physicist. He was a leader in the development of British radar from its inception, starting in 1934, when he was appointed secretary of the Tizard Committee, He succeeded Robert Watson-Watt as Superintendent of the Bawdsey Research Station, and directed the renamed Telecommunications Research Establishment when it moved to Malvern. After the war, he was appointed first scientific advisor to the government of Australia, and Vice-Chancellor of the University of Adelaide. A pioneer of Operational Research.
Martin Ryle, physicist and radio astronomer. He worked at the Telecommunications Research Establishment on the design of antennas for airborne radar during the war. Later, he was knighted in 1966, was Astronomer Royal 1978-1982, and shared the Nobel Prize Physics with Antony Hewish in 1984.
Joshua Sieger, electronics engineer. At Worth Matravers, he designed large-screen displays of radar signals, arranging further components to triangulate a target. At other times, he made many contributions to electronics and communications technology.
Albert Uttley, did important research in radar, automatic tracking and early computing at TRE, including the design of an Airborne Interception (AI) radar trainer for night fighter crews He was a founder member of the Ratio Club and became group leader at RRE, with a distinctive approach to air defence cybernetics. Left to head the pioneering Autonomics Division at the National Physical Laboratory where he did research on machine intelligence and brain modeling. However, he also became well known as a neuropsychologist, having made several important contributions to the field. Later Professor of Psychology at Sussex University. 
F. C. Williams (Freddy), engineer. He worked on radar and servomechanisms at TRE during the war. He then moved to the University of Manchester, where he was a pioneer of computer hardware. He was knighted and became an FRS.
Philip Woodward, mathematician, pioneered the application of probability theory to the filtering of radar signals. After the name change to RRE, he wrote a monograph on the topic. His early results included the Woodward Ambiguity Function, "the standard tool for waveform and matched filter analysis". ref>Malvern Gazette Retrieved 6 July 2009</ref> Member of the Ratio Club.
C. E. Wynn-Williams worked on navigational radar briefly, and was transferred to cryptographic work at Bletchley Park.
Hundreds of other staff members made direct and support contributions to the projects that have been mentioned and to other work of TRE. Many are listed, under the respective group names, by Penley.
^ abcdeS.D. Smith, Robert Allan Smith, Biographical Memoirs of Fellows of the Royal Society, vol.28, 479-504, 1982.
^William E. Gordon. Henry G. Booker (December 14, 1910 to November 1, 1988), Biographical Memoirs, National Academy Press, .
^H.G. Booker, An approach to electrical science, McGraw-Hill, New York, 1959.
^H.G. Booker, A vector approach to oscillations, Academic Press, New York, 1965.
^H.G. Booker, Energy in Electromagnetism, Peregrinus Press, London, 1981.
^H.G. Booker, Cold Plasma Waves, Martinus Nijhoff, The Hague, 1984.
^R. Hanbury Brown, Harry C. Minnett and Frederick W.G. White,Edward George Bowen 1911-1991, Historical Records of Australian Science, vol.9, no.2, 1992. "Archived copy". Archived from the original on 21 December 2010. Retrieved 2010.CS1 maint: archived copy as title (link) ; republished in Biographical Memoirs of Fellows of the Royal Society of London, 1992.